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<h1>wlet
&nbsp;&nbsp;<img src="../mex.png" alt="Linux PC" border="0" title="Linux PC"></h1>

<h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="box"><strong>Forward and Inverse Fast Wavelet Transforms</strong></div>

<h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="fragment"><pre class="comment"> Forward and Inverse Fast Wavelet Transforms

 Usage:
   output = wlet( signal, [output_type [, num_coeff [, direction]]])


   Parameters:

      output_type is one of:

         1  Output is one dimensional, and represents the raw result 
            from the fast wavelet transform algorithm (wavelet coefficients).
            This is the default.
            

         2  Output is two dimensional. This output format is convenient for
           displaying transformed data as a time-scale matrix (scalogram).

      num_coeff 
       
         gives the number of filter coeffients used in approximating
         the wavelet.  Possible values are 4, 12 or 20, and the default is 20.

      direction 

         1  Transform is forward, from time domain to time-scale
         domain. (default)

        -1  Transform is reverse, from time-scale domain to time domain.


 Two dimensional output can only be used with the forward transform, and
 the input to both forward and reverse transforms must be one-dimensional.</pre></div>

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